The weather is a very important aspect of photography. There is, however, no such thing as perfect weather. Weather can only be thought of as bad if it doesn't suit the sorts of images you want. For example, if you want to photograph Sydney Harbour Bridge and the Opera House, overcast and rainy is not good. What you need is bright blue skies and nice fluffy white clouds. But if your sights are set on flower close-ups in the many Sydney gardens or animal portraits at the zoo, then overcast weather will be perfect.